Jakimi liczbami należy zastąpić litery? (1 1/4 +a=1 1/2,) (1/12+x = 1 3/4) ( b-1/2=1/4) (y-1/4=21/8) (c+3/5=1 7/10) ( 7/10-z=3/5) ( d-2/3=5/6) (7/10-t=1/2)

11/4 + a = 11/2 a = 11/2 - 11/4 a = 22/4 - 11/4 a = 11/4

1/12 + x = 13/4 x = 13/4 - 1/12 x = 39/12 - 1/12 = 38/12

b - 1/2 = 1/4 b = 1/4 + 1/2 b = 1/4 + 2/4 b = 3/4

y - 1/4 = 21/8 y = 21/8 + 1/4 y = 21/8 + 2/8 y = 23/8

c + 3/5 = 17/10 c = 17/10 - 3/5 c = 17/10 - 6/10 c = 11/10

7/10 - z = 3/5 -z = 3/5 - 7/10 -z = 6/10 - 7/10 -z = -1/10 /:(-1) z = 1/10

d - 2/3 = 5/6 d = 5/6 + 2/3 d = 5/6 + 4/6 d = 9/6

7/10 - t = 1/2 -t = 1/2 - 7/10 -t = 5/10 - 7/10 -t = -2/10 /:(-1) t = 2/10 t = 1/5